You should probably understand why no one is going to pay someone to hack for him/her. First off, you are asking people to pay $5 worth for someone to hack a few rounds of Co-Op for them; that's not even a guarantee that the user will win rare items. The person can spend $5 more for the actual hack, giving them a higher probability to win (n = higher p-value). Secondly, finding a hacker in-game isn't the hardest thing to do. Get to know people and ask them if they know anyone who hacks. It's not a bad idea, but you may want to consider the reasons to why no one has left a real offer (publicly, at least.)

ill give you 100 gcoins in epin if you help me get berr,
and i will do it after i get the gun perm. because i did bg xtreme 50 times and didnt get shit.
so if your willing to help me , ill give you 100 gcoins. pm or msg me your info , if your interested.